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天山北侧前陆盆地即准噶尔盆地 ,该盆地南缘存在严重的超高压异常现象。异常高压的成因主要为“沉积型”和“构造型”两种造压机制 ,其形成演化分为拉张沉积期静水压力阶段、沉积造压及压力封存箱形成阶段和压力封存箱挤压增压阶段。利用有限元模拟法计算研究区主应力值 ,建立主应力值与异常压力系数的匹配关系 ,预测准噶尔南缘紫泥泉子组异常压力平面分布特征。
The foreland basin on the northern side of the Tianshan Mountains is the Junggar Basin. There are serious anomalies of the EHV anomaly in the southern margin of the basin. The main causes of the abnormal high pressure are “sedimentary” and “structural” pressure-forming mechanisms. The formation and evolution of the anomalous high pressure are divided into the hydrostatic pressure stage during tension deposition, sedimentary pressure build-up and pressure storage tank formation stage and pressure storage tank extrusion increase Pressure stage. The principal stress values in the study area were calculated by finite element method and the matching relationship between the principal stress and abnormal pressure coefficient was established to predict the distribution of abnormal pressure in the Zijinquan sub-group on the southern margin of Junggar.